Shuuko, Eika, Misaki, and Shio are roommates and friends making their way in the busy world of Tokyo, Japan!

Though they share an apartment and a friendship, each faces her own unique problems. Shuuko is feeling the pressure of those around her getting married and has no idea whether she'll truly be happy on her own for the rest of her life. Eika, a hardworking career woman, wants to prove herself to the judgmental men in her office. Romantic and idealistic Misaki is spurred into action when it turns out her "boyfriend" of two years didn't know she thought they were dating. Nurturing and good-spirited Shio struggles to set a work–life balance while paying her many bills.